mpir: fix build on ARM with old binutils versions

Old binutils versions are affected by a bug when the assembly code has
whitespace between [ ] signs, causing a build failure of the mpir
package with ARM toolchains using such old binutils versions.

This commit fixes that by adding a patch that removes those whitespaces.

Fixes:

 - http://autobuild.buildroot.net/results/ec67ffdef74b9a61d0491e71f8cb2f8f0b6daa50/
   armv7-ctng-linux-gnueabihf Crosstool-NG toolchain

 - http://autobuild.buildroot.net/results/2e4a27af60065db51aca9e69701bc191d24b2209/
   armv5-ctng-linux-gnueabi Crosstool-NG toolchain

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

diff --git a/package/mpir/0001-mpn-arm-udiv.asm-workaround-binutils-bug-14887.patch b/package/mpir/0001-mpn-arm-udiv.asm-workaround-binutils-bug-14887.patch
new file mode 100644 (file)
index 0000000..6a6f467
--- /dev/null
+++ b/package/mpir/0001-mpn-arm-udiv.asm-workaround-binutils-bug-14887.patch
@@ -0,0 +1,40 @@
+From d858ce52d1971cb4e8500b0ebc0472fdae4686ec Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Date: Sun, 7 May 2017 23:12:04 +0200
+Subject: [PATCH] mpn/arm/udiv.asm: workaround binutils bug #14887
+
+Old binutils versions are affected by bug #14887,
+https://sourceware.org/bugzilla/show_bug.cgi?id=14887, which causes a
+build failure when a register specification is surrounded by
+whitespaces. Removing those whitespaces works around the issue.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ mpn/arm/udiv.asm | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/mpn/arm/udiv.asm b/mpn/arm/udiv.asm
+index 25197a6..ed11eb3 100644
+--- a/mpn/arm/udiv.asm
++++ b/mpn/arm/udiv.asm
+@@ -50,7 +50,7 @@ L(oop):      divstep(n1,n0,d)
+       teq     r12, #0
+       bne     L(oop)
+ 
+-      str     n1, [ rem_ptr ]         C store remainder
++      str     n1, [rem_ptr]           C store remainder
+       adc     r0, n0, n0              C quotient: add last carry from divstep
+       mov     pc, lr
+ 
+@@ -89,7 +89,7 @@ L(oop2):
+       addcs   n0, n0, #1              C adjust quotient
+ 
+ L(_even_divisor):
+-      str     n1, [ rem_ptr ]         C store remainder
++      str     n1, [rem_ptr]           C store remainder
+       mov     r0, n0                  C quotient
+       ldmfd   sp!, { r8, pc }
+ EPILOGUE(mpn_udiv_qrnnd)
+-- 
+2.7.4
+